Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a0dc271c9209b0cf30a5b770e26773cac3b8a9511f4a1dbdc7381348c1d0c73' 
  AND token = 'y53P2+EX1ObwB3zNGlKNOYTQoZy7DekUifJAYA9zz2s=' 
  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"
    }
  }
}