Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '576578184fd59bb72ed85fc70b2d52595be5cd282a9eeae4ba21c12bb5a89d8a' 
  AND token = 'osTu+pkZGWRZNVtpQaURiztvQJ+KOBgkOSzV+VNErY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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