Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b036800dab61c0a0d0fbc5b95bc9be78c6c586a580edfda663fb41e50c05ca8' 
  AND token = '6rto14d8AjWKsy4zOrqDt4sgAeRCC8Hioq11DfYKeIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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