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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '08f8fa72575fb5058f83ad548ddbefa78c49570aa28dcbbf40f363cfde99becb' 
  AND token = 'TVqFslW4Gp2lOpeLQWNEZfL/P8Cup379poJg6EZV/cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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