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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0f9d31aaa3ea0542b66f0e9c1d60c4cc4c24c668bef350f5e1caca5134e8d7a9' 
  AND token = 'cTdsJjSmCK3IBC+b7l/cfAtTjhtCleN/KtspTL9FyHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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