Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03300e887e2c63c842d6e08098c349a79921684677b4aa7cb26088891d8703aa' 
  AND token = 'LUXvX9R+uLnDtlPjTk2FssQSjQf0OZIqE/qYr9O6FQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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