Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c7d30bc923287bc38d7457b81cec2e635027d2613618c1342ee50d1592eef30' 
  AND token = 'n+4iy0qvt9v71jSqRZjXXOxWR9HTGM9yO5lKp62qcIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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