Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5e604297ed9f67822291f8e677bf73e3e94bee40aa99c7ba33dbfd2770f4f04' 
  AND token = 'gOauHuAMuBMxhPY3AFRQUifkqPbUMCiZZAkul9WLgMM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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