Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4d84eb8aad3b5a35e59dce788c24d4f5abab2a46e49bfdd593eb09a4813847a' 
  AND token = 'G8PHpQyl25XNhlgLU51dx0Ymluu5/Zp/feVGX3O/0lE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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