Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dd33efae63395e7981ae6ec3125ca577e465f8daa9a6050a59f63d10c3d00eb9' 
  AND token = 'AWhER2aHXXP1Q3fyG6IagOSui43uGRRsvQgJLHI1p04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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