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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '093ef8737a1eb499a59f2900f053dd7d1bb6aff2a77c002b5ad0fbf502e45453' 
  AND token = 'eZpKy2XLydYOKIH7i656XruHsAWFxJ8/XCwb9vp9FUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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