Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebd5a7582c8a17aacdd4636758d1eaaa2780a4a66c9f5fdd5b1939f39e654ef1' 
  AND token = 'OnsWcTIOiF2A4HgVU+ZQOpWdGnv2Rp34R0lqwXOPid8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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