Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4e10660abe4f30876eea00c9c9932def4df788501c17839e3d92f6b521fbf1b' 
  AND token = 'a2h1ZoQiA2FaVDr+s5fR/G3MN1EbtWN1zyVioZycMc4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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