Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b07449a320322b4038b084d7311f86e34584ca78639d61c922574ecfe7f801c' 
  AND token = 'g4kZTjPSAtsLVhIxX9hi+EL5fGTyud4Wq465xrtsVso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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