Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0582cb1a7d132002ec201f90f0af98c3d835cf3f0bbf1dd5569b94be77319098' 
  AND token = 'CjEBVjijkR5+9Tp0c/cNHtEFkltDyDI+f3aWvizsaiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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