Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b936ea089a57221aff9b4e094cca5277fcae79fa427193490ec136aeb6b7df9e' 
  AND token = '6MuHNhvCoWnbauE6fIflD8lxrRHzMgJ7bdlha+qGP/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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