Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '570a1ff6acb09d62d4e4b22584c1562368e12e4cadb5a20379d7818c8a9f75fc' 
  AND token = '0qMwynFvH2I78usmKEyL8MHYMRMDMJU7hM/D6n7Cgq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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