Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2370ea79b11f7eae77f9387f83d4a9a0e11267ddf56a474da0b835b567cd2be' 
  AND token = 'LInKCiGElxpPbQkAEDc/9VI//Y/XIq1WGdEc5A6xdIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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