Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4689b293d9c325679f559556c4b9a046a6158ea3e827eaca6fae0047ec8eff88' 
  AND token = 'xAJIcLnDCV+NrDDZBWVZOp9Qj7hA5Wu2SRBGuqdCdyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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