Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4582ad314926c7dda24bac59e90b9a1cc91b0e9df2690a653e45490746a03cc4' 
  AND token = 'V0fgj4bapepp0F6S/LxiRDPCDZ4Sm7xLLGTgoertorw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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