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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4f4d081cb23d76511535a8f1a774bff5eb776e27de1989a6191884a4e1e520b8' 
  AND token = 'M6LTrPQ2bbmuf1GiQTO1/4ggQv9K4Qn/asXkEqjusNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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