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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '001b58af26c5acce1bb73c7bd1937abe78464b9a38ffb77b2f840de8a9a429ed' 
  AND token = 'JP4tIxLE+JAnNMyYkHsp3xGfwTREn+F/uUdZB3z7U6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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