Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86095f4d14c467215efbf718060969e97198153a6401f328c491338190c4fd52' 
  AND token = 's4qPjpb8oxd73KfOStSpvHVlDK9mC+ptk7fekaeDzsc=' 
  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"
    }
  }
}