Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8e68771166f870cb556c915c1eff40cdbd011a760853773494a107a9647fafb' 
  AND token = '9Ryji3Qlf+EFd+xo7sP+0JRyMfvlmB8TpFXemv3ulsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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