Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdca823bbe10bd2ecc6b590a8b161563740e794261764df29446ff0a2ef10041' 
  AND token = 'LD56N+VbBJd3x8Ih6Ydk6We9l7aOYpve8AQgNat6Fts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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