Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15b22fac2aa5c3abd2d025f94ba6ee89fed5abdf23b9d2fe194a907089782f68' 
  AND token = 'h/MADRPGMHyUz/k5m6qEdNLxh69SV4/QbAkoBf5VwRk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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