Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39bcc9249b58cd0785e2d41e184dc13c088aa8235262a86c0bcd1d09da614bc3' 
  AND token = 'yt0uBQynmX6EQ6dBPYMgVh5X0Qf8BiHKwqec+kAXRJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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