Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fead3af3303852bfd577908e958a9ce003a679d3c79c6ab49712a932ef9cfbd' 
  AND token = 'Ij7Rn1njJ4grkZ6bZ2EYRiMYAfu3Lp+ItooCu5aY1zk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}