Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd5d5f5a7e810ede9597d078df2d5abb4c977540567081ddc8170daa38b09f5a' 
  AND token = '96ve0EJub/2aujNYrHBif/sGrkgfrCyhMnERl1uuxV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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