Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fc695e44c018536addbc0a56afd669ef377a1872aa7d3f55b33455e44999b28' 
  AND token = 'tYuYANpfiAvjvpjj0iCaes7y+zNBL1bajKo4/Qf5b0U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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