Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd42ab73024d574f7e37e3cdbe1e8b69e17ed5acc249be1e6e7ccb03f9a08ca70' 
  AND token = 'JODYBuGWJaYYjqR8vYPJc7A7V3SEQbXunpyEFsRESUw=' 
  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"
    }
  }
}