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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '749cc4dc082007521cb71db1b36a46e1bec6b756025d6b2b769b37ae7a96a9aa' 
  AND token = 'OaAmuGfAT2OsrUMp/pht0uWBdHNPFJN+4TUC3Iq4Zj4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}