Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '697c57c2b1e1baf475eae0c269bfc90f18a73983ff75b549fcdd4c8bf89e9a1c' 
  AND token = 'OAoDRD/UIAPOidJR28oYBn+68LCJWfzO6e+cdFB+DKE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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