Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29aa5604491d8470241755dcfe664ed1fe7f97c07cea17e28cd3f37d5fae066f' 
  AND token = 'JyoJ/3x1rCeHZN7cBxZ6HKvtpqECTpdO7vzIqZ9kQpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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