Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '42e14b58e87fd2d330ac7ad92302ce1863c7ee0298545fb4d4587c17da793ac5' 
  AND token = '/vp35qrLpZgIxR1CoV2Udmr1Z4OU9LfddtALSSAodEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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