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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd74d358be5f999a8c8a7ba2ff07c0740537a699eb83981073dd02d55f63e3cc3' 
  AND token = '1pOOvTJXp5QKBb/+KQ2DRP0O60u5H+UxiIfur7ZeL80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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