Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4780f4485123bfe49acccfda0e979b0665099d749e7b27d76f6f00775d570b77' 
  AND token = 'JuxfipobIH/9pgHWn9SQh2zN4cAvsr3jDV8NDp2URwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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