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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65b8a4fc8bdc31f8a95b21afca1e2f1b56d1b1ea0e54b0bd7483b7cc0d8cb2de' 
  AND token = 'OCrxGtOmN3BUwE582VWpNU2bN+8nUUjU5EwHYeinptg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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