Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29336006c5ad5269ddb5041ba810134da9ccaf0b6c74096fac00589974b803bc' 
  AND token = 'ENlMQIre15b6X01r8HLCX79KZzW5ewm37Uk7TEB+2tA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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