Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '569cb0cf6f3cbc96c392e02af25d35b294ca63b3060e012af1074c42000e243b' 
  AND token = 'XBO7KjAgfy6ZOkw9egU0bY5+07EkI78NGMZFkPljBb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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