Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27ecc0cccd0d52b6d7459f8c90318d376a8a36f80ac11b89aa690d9fde5cdfd2' 
  AND token = 'KvxhSbcktscRJ9yjmGAb7VhLoy5XkZ7Ga2ZLLbNv1os=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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