Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '987cd062fab3f5d9b9fcd8666d9291ee37781401b154265dc969a4a9b3f9c15b' 
  AND token = 'ciwENQrae4ky4PsEwfcbAkOls9MVp33IcEtF90bFyeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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