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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b1fc162d461a4facc1a607debefee72591f25ffffea1548d9d1b158d7b87adf' 
  AND token = '88APOfXqwipw9b6RkL57G/301XNnjDlSt00PtjkgV+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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