Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04c835c4ebe2cc8beb4045630b1d5ba8e5b70923de9ce2dde9515154587dfdd4' 
  AND token = '8mOr729gbBJaguk50XYIPI/fgXt0yLGn02vqpoDJfDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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