Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8d0fcb2d81544d0b663a50f7cb9d223f156620ef3d6f945418d7e402c5e5324' 
  AND token = '3Qrkm26tivKkUE7UyM5vu/ArDLx/WohmmZnfpeP8/FQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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