Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd9108a882a72bc8694adcdcd29d9120ea631761089bc9a5ab2f5647ce3becaf' 
  AND token = 'OLZ2N3FX1L1w/sy0krCX0BhN33je1UUb7LBi3PPpAG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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