Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bdf45f5c430bfbe185898abf7e55bd79aeb9f554970df6f949f1568e356a768a' 
  AND token = 'x4Dtv32ZxrRWHuce8YHcUaytdmfEMCQD7t6gTT03AHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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