Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0b41f66e2cf9f3529113e2b0c8b90b35055064ae8a085b4e3643999a997a591' 
  AND token = 'Ue6tmX/Gz2NcC2NbcOlGYKBw2qzwifkTZn9N6NWEh6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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