Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b23ec348b926264da5aebd4707d73988390bb15019f46f1f14f01d3bcaacc702' 
  AND token = 'qdxJOqmKOjBt48CANpkqCym414PhbcpVRa4U5I+s8Sw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}