Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ebccdf542f1681739d3082282d865585d8f6a7edf01334abb061f0ba33ed612' 
  AND token = 'ryOQ1IABAXqxGuojzHrHojpsyzDq/r1FftAUeLjAwr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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