Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af52ea95e1a2928fd03cd9ca5a2cabb1bcdf0f67477bf18e0d0c0e68d24e1766' 
  AND token = 'o56Bg8R99aoTs2mjAmBj+AQOPHwYfOc5HdrcDvKO31Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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