Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4741bb69e86a9890cd305682c0671fcdc360bd31536956d388e48533a4137810' 
  AND token = 'XOqSkCFSE6e5oDq7jp98ZP+0TQo5PCIamvLf1Uxl2v0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}