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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8672e84f1b9e3c6b425397a19d06ae4f701437494cf501a4ce54de5d22776311' 
  AND token = 'gf0AH9DwUbjpCbI5WqfhIZINySDTpileJczpodlorrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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