Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '220785af4c2801a44ec5f5a54adfee67e4f928de7d30c3793991efa94b942ac4' 
  AND token = 'ki7kZ0afRQQrR1Cc8XX7D5KsDv8J6bAZl/2/s6V+fqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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