Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1684ab4bed761de9e9bf00d36bc640fbd15af6e0a7208cadd57e88fc99e25433' 
  AND token = 'B9wgSRc30D+9fIDUdjSh/yOYmzI3H/HcO7jtaA++bDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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