Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57cc152a78cdfecaeeefe2c975e89627f347938f43d17aca3b7c39940164d7dc' 
  AND token = 'w/qeyBiYUs8qKgG+DGjY4feiIkiCTkrkSp3JAnUdHnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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