Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '11c1879d8c22002517a3a65cc6a6e9bb423aa85a54bdec7f5023828ae7687dc7' 
  AND token = 'IXZ4xWPEb2/oqftcp1bLqcbHfut0YUGlJtzvT6Dxl34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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