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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '093a1a804745f57ea8be844db595f79382484134807f1955009b6110e4c40be7' 
  AND token = 'QAc8J3YmkHKGU4adHbSFD9FFNr/yYvXU4xohMi7zPfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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