Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ae8537c69d07663dd525124fba5550652b3eecfe12fc7d81b7fac0c0b3e3f42' 
  AND token = 'sptwLafvMJ5n3mmHEEOoosTdXlvOfYGpm9UB4C4puHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}