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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2beb64cdc7bb9cdde09a43c86e1cbd581d6d51df7d8a4e188df1eb1348513a22' 
  AND token = 'IWJKtoGeb4f4SJVvCCHJotfi4ATk7V58r0FkjzQTLvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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