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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fe83029486a0d3dc52e23d2183e68f074e090340f34cc212611d2d9d6ebf82cd' 
  AND token = '5pnsKgiwZR593MFaxJC9bqAwIHU/pH1K3WBiApsQ0Tw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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