Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f52cb31711b41600d0b9f86625536f1f681ad9d5a0ff658da010b03c0433747' 
  AND token = 'T6tClGo1OjVdmWVfueOp73O7lxLJ8nSIbQKNpGhynrQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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