Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19f3d33d6764673dbf489cceb8a086601534db2650cf0a13493fefd2cc8cb16c' 
  AND token = 'KyekV6xdNNg8zABe0MgAztjbw8/eZXF72WBC+FfMDcE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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