Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0243e232b02e8e7998ee282cfaf01c05b4a4a740e468535821b2738404169613' 
  AND token = 'rLirXsDrXnQqzk6toHphz1oDK0c81R7qZMDRjttoEtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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