Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '748afea81d09b859dde2fc53a319c24c4f9c9cc09c816868cabc4fa636f02d99' 
  AND token = '2Ek4i+ZvHdPARRQky1aXPJRB5G8AZv8brkOVQbtmCjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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