SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95857e78bf19643d2f4133169052c13f5c2509aaf83b47f2c6aeb2df57e169ad' 
  AND token = 'X7M/44qc1UkVh6ili9a3qNTiHzmEPSWE/fZ0j8BEv+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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