Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d59b92ed09c00ed333a7c2e4c0a52c41a8f33ec9f52af832b2367f9ff8e9352' 
  AND token = 'f1r5ju/6zhx/41ADblJ2GHLFi37ktupU48JlNU+R0zo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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