Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '53e7da3b79bb759140500e64dd7e2df9459e77935bf7991c19b55dfa87653aed' 
  AND token = 'MNMDd0WRSAV7vjMRQbu6YGiSdsOXqeL4oWd3Yu98wR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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