Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '92af5e3020f022d91c012560d7f76739bb3bf39ec8539a6f85d8a3b2f1255871' 
  AND token = 'D4b1xtDIVCDL5eX9Z5e/7WzRokcaqdrpyLyj7XggMRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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