Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee9d3f28fa148d80ce1c445344a1f3da1c12b824373066a8b471e49f993df391' 
  AND token = 'WXJ2Tr5RDd/vey2CkzNRxA345bw7xkpdlcxWepCROHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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