Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6892a2fcfe0b4baff63d9d0929644995958db79b06123d2e5c2ad25d0af3f953' 
  AND token = 'UPWKe9G09mQe4/HWgBXWG5fdP83HPazvX9wmOiYPAzg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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