Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f991f432afa75c4be0849a1f4a3c08c4808097eff0affcc472a1c7fc050507c' 
  AND token = 'W08kwIvIF30Qbh+YRq2ILh0ZVUDhGRkOkt6AltAMENw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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