Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94c276f5046a79d98c290f09f9c0eae2be7a8297052e06cbdf19f8facd0a68d9' 
  AND token = 'WyVKkNF0wLXaVWMKS14ZNHURZ2dhUfn6+2ZdUHjARH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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