Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '724fce61fbbd0c3c4b3aa93df80d7315c73870f8190dfee380497364fbfee02d' 
  AND token = 'YXy4JTsxkyiGKTknfi7RRooMPVwlL7dTfFMYHs34nI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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