Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c2bab7e8cb870faa5a39e2c8a69a2e145d1ea1e8b3050e6a14fbb52ad0732c6' 
  AND token = 'VwxeC2z+oI15n1P7EmpBszZxCre5ozrZukTP1EXhWJ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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