Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86744222e528606b76d8c61dcf824afcafc13c5864ed293542599c7f9f51a678' 
  AND token = 'wZoYii/22/4agFP6h/V/KDOtAJSkbhAoA9/rGVMhNkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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