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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b85312d8a6a448a7ad41f7fdc701a5acad1fbbd37333ea3f80808c83fa3a019' 
  AND token = '4h7V+FbG7PesQ7pa2wdE0aJ35ZlwQTa86Q/GQ8cIIws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}