Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f5877f80cb8f5505771f80b65be9996aba0a8b5fa27b4f3b13044f831b65541' 
  AND token = 'exwXoug+8iEMjXJvYUGWkttwO9JE9sIAk0925KO9NMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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