Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0235e6d1cbce61528f59cc1a29912976938558d3894d6059f1093f491c6aa96' 
  AND token = '/KOLPdYb0jk1FHdTyXmEr7iaKJ/p8BBim6zmZ1Dq/Is=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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