Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3f3e309ad73f179a6fd8abdb0c6607eaae4484fdf489be7e0b607ca38c7625f' 
  AND token = 'qmNc3f+3ol5fjYTHN6ujnBALgeFiTvRT6Zk7NW77D0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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