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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7fa0384ee422c76a9c23882ca0d47671473d72e66df61ad53adc52ff85d0d542' 
  AND token = 'G8WDlOBZNdiFIoFZXeSNGGXVwXJgGIR+PPTcw7rT1ZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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