SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7de312f63007e4dbf01dea3189f795c863adff55d6a8e4336f7d343fb9c288b6' 
  AND token = 'foCFcYp8PsJpPS/1OaNVFWEZGfGUkXMOn/4hqw+ZKP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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