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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'bd44a45edf109d4ba1ee9c2805be4fabf896c56ad846d71fd2ac703b7ec6183b' 
  AND token = 'nSBxtsRaSD8uaBXSEYB+FSMQJSJI51wJW78B6wEQo/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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