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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0be39997785fca5aa81cb333899dea94bca420d55fc22ca3de5a19f52bfefbf6' 
  AND token = 'hB8PilYn3TWqSMA4Vft6BBSH96XHKfGb1oYMNyJI8VU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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