Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '44de20e70ed6392bcc6b6838b8a8cd55b3fec6f6823b62a8ba5e7533e5e6af08' 
  AND token = 'eJYjGlAYu9xSfQbjEljecVds/UDeFP9uJP4O5PgV24Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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