Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f2f05e418273184777b8be3ddf4218dc9566f5737b7fa0d75b8046a1873d895' 
  AND token = 'DTsS14NcNsTG1ucP5WdsMfDCjZh33r1pLn8N8JKyVPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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