Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1142f664ba06f89ed3e8ee386513ea1faf7cbcbab7781a3544a316f6feb1940' 
  AND token = '2lshf/dGs6cj8mmUaA5mjGaTJRMCEbXFZ9h75DoQdFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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