Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f51e84cf84d09603e48935e92bc1f9bb95b6625ccbb9364b28f2bc84b42a2eef' 
  AND token = 'dy8pSqq+u3jRl6a8TrxfXTfYnWfbz64r+6X0DGC6V4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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