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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b037ae7f22b77d48f4f19610e0df6ad180946ca78e2340003e07b2a1b92c22a3' 
  AND token = '6zf9kMCoXwVcdMqAgw7p5Kpq40D3xPIYcwzDw5m7JPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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