Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33c682ef2888e855e620b7bb2fdfb149e3eafdfa6b5c31bc9df00b8903e4152a' 
  AND token = '88jgtnruwmT+MQ3s3FmvgN09fg7SzmTHIw7vsN6Jf+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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