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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfac3414488054efa65ac5dc41afab5f3cdb0b45d661564504fe638cdc8ec35f' 
  AND token = 'ja4yE8nxT8/PbAoQXpf9W/gszx4eZ9j50xSitdtSvEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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